Soft seal installation for feed water check valve

Details Soft seal installation for feed water check valve Soft seal installation for feed water check valve

1982-02-24

1983-10-18

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

Direct response valves

1375278, 251175, F16K 1503

Patent

active

044100078

ABSTRACT:
A feed water check valve of the swing type is provided with a soft seal backup to the main element to ensure sealing of the valve plug so that no leakage occurs during testing or when full closure is required as in an emergency.

REFERENCES:
patent: 612890 (1898-10-01), Wood
patent: 2556904 (1951-06-01), Cline
patent: 3075547 (1963-01-01), Scaramucci
patent: 3658292 (1972-04-01), Takigawa
patent: 3837616 (1974-09-01), Scanderberg
patent: 4083529 (1978-04-01), Santy
patent: 4248404 (1981-02-01), Goldman
patent: 4258925 (1981-03-01), Guyton

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